{
  "id": "cond-mat/0004095",
  "version": "v1",
  "published": "2000-04-06T11:35:26.000Z",
  "updated": "2000-04-06T11:35:26.000Z",
  "title": "Rotational and vibrational spectra of quantum rings",
  "authors": [
    "M. Koskinen",
    "M. Manninen",
    "B. Mottelson",
    "S. M. Reimann"
  ],
  "doi": "10.1103/PhysRevB.63.205323",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.str-el"
  ],
  "abstract": "One can confine the two-dimensional electron gas in semiconductor heterostructures electrostatically or by etching techniques such that a small electron island is formed. These man-made ``artificial atoms'' provide the experimental realization of a text-book example of many-particle physics: a finite number of quantum particles in a trap. Much effort was spent on making such \"quantum dots\" smaller and going from the mesoscopic to the quantum regime. Far-reaching analogies to the physics of atoms, nuclei or metal clusters were obvious from the very beginning: The concepts of shell structure and Hund's rules were found to apply -- just as in real atoms! In this Letter, we report the discovery that electrons confined in ring-shaped quantum dots form rather rigid molecules with antiferromagnetic order in the ground state. This can be seen best from an analysis of the rotational and vibrational excitations.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2000-04-06T11:35:26.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantum rings",
      "vibrational spectra",
      "rotational",
      "two-dimensional electron gas",
      "ring-shaped quantum dots form"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. B"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}